Income Taxes (Reconciliation Of The Provision For Income Taxes) (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 22, 2017	Oct. 01, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Domestic			$ 143,114	$ 137,247	$ 77,007
Foreign			90,644	46,590	104,704
Earnings before income taxes			$ 233,758	$ 183,837	$ 181,711
Federal statutory income tax rate	21.00%	35.00%	21.00%	24.50%	35.00%
Transition tax on foreign earnings			0.003	0.168	0
Revaluation of deferred taxes			(0.002)	(0.060)	0
Withholding taxes			1.00%	4.00%	0.00%
Reversal of indefinite reinvestment assertion			0.60%	5.60%	0.00%
R&D and foreign tax credits			(2.10%)	(4.20%)	(3.80%)
Divestiture impacts			0.00%	0.00%	(3.20%)
Foreign tax rates			2.20%	(0.70%)	(2.40%)
Equity-based compensation			(0.60%)	(0.70%)	(1.20%)
Export and manufacturing incentives			0.00%	(0.30%)	(0.90%)
Change in valuation allowance for deferred taxes			(0.70%)	5.70%	(0.40%)
State taxes, net of federal benefit			1.50%	1.90%	0.40%
Other			0.10%	0.80%	(0.80%)
Effective income tax rate			23.10%	47.40%	22.70%